PCF8576DT/2,118

Overview

The PCF8576DT/2,118 is a single-chip LCD controller and driver designed for low multiplex rate applications. It interfaces with Liquid Crystal Displays containing up to four backplanes and 40 segments via a two-line bidirectional I²C-bus. The device features selectable backplane drive configurations (static or 2/3/4 backplane multiplexing) and display bias settings (static, 1/2, or 1/3). It includes internal LCD bias generation with voltage-follower buffers and 40 × 4-bit RAM for display data storage. The component supports a wide power supply range from 2 V to 9 V and offers versatile blinking modes.

Feature Summary

• Single-chip LCD controller and driver supporting static or multiplexed displays
• Two-line bidirectional I²C-bus interface for communication with microcontrollers
• Internal LCD bias generation with voltage-follower buffers
• Display RAM with auto-incremented addressing and hardware subaddressing

Applications

• Low multiplex rate liquid crystal displays
• Battery-operated telephone applications
• Portable instruments requiring low power consumption
• Automotive twisted nematic LCDs

Procurement Notes

Verify the specific suffix '2,118' against official NXP documentation to confirm package type and availability status. Ensure compatibility with system I²C bus speeds and logic levels. Check for RoHS compliance and environmental certifications required for the target application. Confirm lead times and production cycles as these may vary based on manufacturing schedules.

Selection Notes

Select this component when driving LCDs with up to 40 segments and four backplanes using an I²C interface. It is suitable for applications requiring separated LCD and logic supplies. Consider cascading multiple units for larger display requirements. Evaluate power consumption needs, particularly if battery operation is critical, given the available power-saving mode.

Part Context

The PCF8576 series belongs to NXP's family of universal LCD segment drivers. These devices are designed to interface with almost any LCD having low multiplex rates. The DT variant typically denotes a TSSOP package. This series minimizes communication overhead through efficient memory management and is compatible with most microprocessors and microcontrollers.

Replacement Considerations

PCF8576CHL/1,118: Alternative package option (LQFP) with similar functional specifications.

FAQ

Can the PCF8576 be cascaded for larger displays?

Yes, the PCF8576 can easily be cascaded to support larger LCD applications beyond its native 40-segment capacity.

What is the maximum number of backplanes supported?

The device supports up to four backplanes for static or multiplexed drive configurations.